Defrosting control method, device, system, temperature control equipment and storage medium

Abstract

The present application relates to a defrost control method, device, system, temperature control equipment and storage medium. The method includes: obtaining the statistical number of modules to be defrosted in the current heating unit, obtaining the water channel availability status of the standby unit when the statistical number meets the unit switching condition, controlling the standby unit as a heating unit to enter a heating mode when the water channel availability status of the standby unit is available, and controlling the current heating unit to enter a preset defrost mode after the standby unit enters the heating mode. Since the number of modules to be defrosted in the standby unit is less than the number of modules to be defrosted in the current heating unit, the heating capacity provided by the modules in the standby unit is higher than the heating capacity provided by the current heating unit, thereby preventing the modules to be defrosted in the current heating unit from consuming the heating capacity generated by other modules in the same unit after entering the defrost mode, thereby reducing the heating performance of the terminal coil.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration temperature control equipment, and in particular to a defrost control method, device, system, temperature control equipment and storage medium. Background Art

[0002] With the increasing promotion of energy conservation and environmental protection, and the shift from combustion heat generation to electric heat generation under the background of a dual-carbon energy structure, air source heat pump heating has gradually become the mainstream heating method in the market. With the popularization of air source heat pump systems, user feedback has also increased. In traditional air-cooled modular systems, all modules are connected in parallel on the same main pipe. When a module enters the defrost state, it consumes the heat generated by other modules. As the number of modules that need to defrost increases, the heating capacity is insufficient to heat the terminal, resulting in lower room temperatures at the terminal. Especially in some areas with lower temperatures in winter, the heating performance of the air-cooled modular system decreases after entering the defrost state, making it difficult to meet winter heating requirements. Summary of the Invention

[0003] The present application provides a defrost control method, device, system, temperature control equipment and storage medium to solve the problem of insufficient terminal heating caused by decreased heating performance after the air-cooled module system enters the defrost state.

[0004] In a first aspect, the present application provides a defrost control method, the method comprising:

[0005] Get the statistical number of modules to be defrosted in the current heating unit;

[0006] When the statistical number meets the unit switching condition, obtaining the water channel availability status of the standby unit, wherein the number of modules to be defrosted in the standby unit is less than the statistical number;

[0007] When the water path of the standby unit is in the available state, the communicating water path between the standby unit and the terminal coil is opened, and the standby unit is controlled to enter the heating mode;

[0008] After the standby unit enters the heating mode, the connecting water path between the current heating unit and the terminal coil is disconnected, and the current heating unit is controlled to enter the preset defrost mode.

[0009] In a second aspect, the present application provides a defrost control device, comprising:

[0010] The first acquisition module is used to obtain the statistical number of modules to be defrosted in the current heating unit;

[0011] a second obtaining module, configured to obtain the water channel availability status of the standby unit when the statistical number satisfies the unit switching condition, wherein the number of modules to be defrosted in the standby unit is less than the statistical number;

[0012] a first control module, configured to, when the water path availability status of the standby unit is available, connect the communicating water path between the standby unit and the terminal coil, and control the standby unit to enter a heating mode;

[0013] The second control module is used to disconnect the connecting water path between the current heating unit and the terminal coil after the standby unit enters the heating mode, and control the current heating unit to enter the preset defrost mode.

[0014] In the third aspect, the present application provides a defrost control system, which includes an air-cooling module unit system and a defrost control device as described in the second aspect, the defrost control device is communicatively connected to the air-cooling module unit system, the air-cooling module unit system includes multiple air-cooling module unit units, the first end of each of the air-cooling module unit units is connected to the first end of the terminal coil through a water outlet valve, and the second end of each of the air-cooling module unit units is connected to the second end of the terminal coil through a hot water pump parallel group, and the hot water pump parallel group includes multiple parallel hot water pumps.

[0015] In a fourth aspect, the present application provides a temperature control device, including the above-mentioned defrost control system.

[0016] In a fifth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the above-mentioned defrost control method of the present application.

[0017] The above-mentioned technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method provided by the embodiment of the present application obtains the statistical number of modules to be defrosted in the current heating unit. When the statistical number meets the unit switching condition, it indicates that the number of modules to be defrosted in the current heating unit meets the switching condition of the heating unit, and it is necessary to switch from the current heating unit to other air-cooling module units to provide heating capacity. Then, the water path availability status of the standby unit is obtained to determine whether the standby unit can be used as a heating unit for heating. When the water path availability status of the standby unit is available, the standby unit is controlled as a heating unit to enter the heating mode. After the standby unit enters the heating mode, the current heating unit is controlled to enter the preset defrost mode, that is, the current heating unit is stopped. Stop heating and defrost to avoid the current heating unit being affected by the defrosting of the module to be defrosted, resulting in poor heating effect and inability to meet the heating needs of the terminal room. Switch from the current heating unit to the standby unit for heating. Since the number of modules to be defrosted in the standby unit is less than the number of modules to be defrosted in the current heating unit, the heating capacity provided by the modules in the standby unit is higher than that provided by the current heating unit, preventing the module to be defrosted in the current heating unit from consuming the heating capacity generated by other modules in the same unit after entering the defrost mode, thereby reducing the heating performance of the terminal coil, and the frost of the module to be defrosted in the current heating unit will not affect the heating performance of the heating module in the standby unit, thereby relying on the standby unit to provide sufficient heating capacity for the terminal to meet the heating needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 A structural block diagram of a defrost control system provided in an embodiment of the present application;

[0022] Figure 2 A structural block diagram of an air-cooled module unit system provided in an embodiment of the present application;

[0023] Figure 3 A schematic flow chart of a defrost control method provided in an embodiment of the present application;

[0024] Figure 4 A schematic flow chart of a defrost control method provided in an embodiment of the present application;

[0025] Figure 5 A structural block diagram of a defrost control device provided in an embodiment of the present application;

[0026] Figure 6 This is a block diagram of the internal structure of a temperature control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0029] Figure 1 FIG. 1 is a structural block diagram of a defrost control system in an embodiment. Figure 1 The defrost control method is applied to a defrost control system. The defrost control system can be mounted on any temperature control device to implement the defrost control method described below. The temperature control device specifically includes an air conditioner, a heat exchanger, a cooling and heating fan, a heater, etc. The defrost control system includes an air-cooling module unit system 110 and a defrost control device 120. The defrost control device 120 is communicatively connected to the air-cooling module unit system 110. The defrost control device 120 is used to control the air-cooling module unit system 110 to enter different operating modes. The operating modes specifically include heating mode, cooling mode, preset defrost mode, etc.

[0030] The air-cooled module unit system 110 includes multiple air-cooled module unit units, the first end of each air-cooled module unit unit is connected to the first end of the terminal coil through a water outlet valve, and the second end of each air-cooled module unit unit is connected to the second end of the terminal coil through a hot water pump parallel group, and the hot water pump parallel group includes multiple parallel hot water pumps.

[0031] Reference Figure 2 Taking the air-cooled module unit system 110 as an example, it includes three air-cooled module unit units, namely A1, A2, and A3. The water outlet valves connected to each air-cooled module unit unit are B1, B2, and B3 respectively. The number of hot water pumps connected in parallel in the hot water pump parallel group is greater than the number of air-cooled module unit units. Usually, the number of hot water pumps is the number of air-cooled module unit units plus one, that is, each hot water pump is used to control the water outlet of one air-cooled module unit unit, and the extra hot water pumps are used as backup water pumps. When a hot water pump fails, the backup water pump can be switched to for water circuit control. Therefore, refer to Figure 2 When there are three air-cooled module units, the hot water pump parallel group includes four hot water pumps connected in parallel, namely C1, C2, C3, and C4. Figure 2 D1 in the diagram indicates the terminal coil in the terminal room.

[0032] When the air-cooled module unit system 110 is heating, the air-cooled module unit unit, the water outlet valve and the hot water pump need to operate together, among which the air-cooled module unit unit A1 corresponds to the unit water outlet valve B1, the air-cooled module unit unit A2 corresponds to the unit water outlet valve B2, and the air-cooled module unit unit A3 corresponds to the unit water outlet valve B3. The hot water pump does not need to have a one-to-one correspondence with the air-cooled module unit unit and the water outlet valve. As long as there are hot water pumps corresponding to the number of open water outlet valves running when the water outlet valve is opened, for example, when one water outlet valve is opened, any one hot water pump can be turned on. When two water outlet valves are opened, any two hot water pumps can be turned on.

[0033] In one embodiment, Figure 3 A schematic diagram of a defrost control method in one embodiment, referring to Figure 3 , provides a defrost control method. This embodiment mainly applies this method to the above Figure 1 Taking the defrost control device 120 in FIG. 1 as an example, the defrost control method specifically includes the following steps:

[0034] Step S210, obtaining the statistical number of modules to be defrosted in the current heating unit.

[0035] Specifically, the current heating unit is an air-cooling module unit in the air-cooling module system 110 that is currently operating in a heating mode, and the current heating unit includes multiple air-cooling modules. However, as the current heating unit continues to heat, each air-cooling module in the current heating unit will be frosted to varying degrees. If the amount of frost is large, it will affect the heating effect. Therefore, it is necessary to defrost the air-cooling module with a large amount of frost. That is, the module to be defrosted refers to the air-cooling module with a large amount of frost waiting for defrost. The number of modules to be defrosted in the current heating unit is counted to obtain the statistical number.

[0036] Step S220: When the statistical number meets the unit switching condition, the water channel availability status of the standby unit is obtained, wherein the number of modules to be defrosted in the standby unit is less than the statistical number.

[0037] Specifically, the degree of influence of subsequent defrosting of the modules to be defrosted in the current heating unit unit on the heating effect is estimated by statistical number, that is, the more statistical number of modules to be defrosted, the higher the degree of influence of subsequent defrosting on the heating effect; conversely, the fewer statistical number of modules to be defrosted, the lower the degree of influence of subsequent defrosting on the heating effect. When the statistical number meets the unit switching condition, it means that the subsequent defrosting of the module to be defrosted in the current heating unit unit has a high degree of influence on the heating effect, that is, the number of modules to be defrosted in the current heating unit unit meets the switching condition of the heating unit unit, and it is necessary to switch from the current heating unit unit to other air-cooling module units to provide heating capacity. At this time, the water path availability status of the standby unit is obtained to determine whether the standby unit can be used to provide heating capacity for the terminal coil. The standby unit unit and the current heating unit unit are different air-cooling module unit units in the air-cooling module unit system 110, but the standby unit unit is in standby state when the current heating unit unit is heating. Therefore, the air-cooling module in the standby unit unit will not be frosted or frosted a lot due to heating, so the number of modules to be defrosted in the standby unit unit is less than the number of modules to be defrosted in the current heating unit unit. Under the same operating environment, the standby unit unit can provide more heating capacity than the current heating unit unit because the air-cooling modules are not frosted or the amount of frost is small.

[0038] Step S230: When the water path availability status of the standby unit is available, the communicating water path between the standby unit and the terminal coil is opened, and the standby unit is controlled to enter the heating mode.

[0039] Specifically, when it is determined that the water path availability status of the standby unit is available, it means that the standby unit can be used to provide heating for the terminal coil, then the connecting water path between the standby unit and the terminal coil is opened, and the standby unit is controlled to enter the heating mode to provide heating for the terminal coil.

[0040] Step S240: After the standby unit enters the heating mode, the connecting water path between the current heating unit and the terminal coil is disconnected, and the current heating unit is controlled to enter the preset defrost mode.

[0041] Specifically, after the standby unit enters the heating mode, the connecting water channel between the current heating unit unit and the terminal coil is disconnected, and the current heating unit unit is controlled to enter the preset defrost mode, so as to complete the switching from the current heating unit unit to the standby unit for heating. The preset defrost mode includes natural defrost mode and forced defrost mode. The natural defrost mode is to allow the defrost module to be naturally defrosted when it is in a shutdown state. The forced defrost mode is to defrost the defrost module by enabling the heater or lowering the heating temperature. In this embodiment, the current heating unit unit is controlled to enter the natural defrost mode for natural defrosting. Since the number of modules to be defrosted in the standby unit is less than the number of modules to be defrosted in the current heating unit, the heating capacity provided by the modules in the standby unit is higher than the heating capacity provided by the current heating unit. This can prevent the modules to be defrosted in the current heating unit from consuming the heating capacity generated by other modules in the same unit after entering the defrost mode, thereby reducing the heating performance of the terminal coil. In addition, the connecting water path between the current heating unit and the terminal coil is disconnected, so the frost on the modules to be defrosted in the current heating unit will not affect the heating performance of the heating modules in the standby unit, thereby relying on the standby unit to provide sufficient heating capacity for the terminal to meet the heating needs.

[0042] In one embodiment, when the statistical quantity satisfies the unit switching condition, obtaining the water path availability status of the standby unit includes:

[0043] When the statistical quantity is greater than or equal to the quantity threshold, obtaining the water path availability status of the standby unit; or,

[0044] When the modular frost rate corresponding to the statistical quantity is greater than or equal to the defrost rate threshold, the water channel availability status of the standby unit is obtained.

[0045] Specifically, the quantity threshold can be customized according to the switching sensitivity of the heating unit in the actual application scenario. The larger the quantity threshold, the lower the switching sensitivity of the heating unit, that is, the less likely it is to switch the heating unit. The smaller the quantity threshold, the higher the switching sensitivity of the heating unit, that is, the easier it is to switch the heating unit. When the statistical quantity is greater than or equal to the quantity threshold, it means that there are a large number of modules to be defrosted in the current heating unit. Due to the large amount of frost, the heating effect will be affected in the heating mode, and more heating output of other air-cooling modules in the same unit will be consumed when the defrosting module is defrosting, further reducing the heating performance of the terminal. Therefore, the current heating unit needs to stop heating and switch to other air-cooling module units to serve as the heating unit for heating. Therefore, the water availability status of the standby unit is obtained to determine whether the standby unit can be used to heat the terminal.

[0046] The modular frost rate corresponding to the statistical number is the ratio of the number of modules to be defrosted in the current heating unit unit to the number of all air-cooled modules in the current heating unit unit. The statistical number is recorded as m, and the modular frost rate is recorded as a, then a=m / N, where N is the total number of air-cooled modules in the unit unit. This ratio is also used to estimate the degree of influence of the subsequent defrosting of the modules to be defrosted in the current heating unit unit on the heating effect, that is, the higher the modular frost rate, the greater the influence of the subsequent defrosting of the modules to be defrosted on the heating effect. Conversely, the lower the modular frost rate, the lower the influence of the subsequent defrosting of the modules to be defrosted on the heating effect. The defrost rate threshold can be customized according to the actual application scenario, such as 30%, 40%, 50%, etc. In this embodiment, the defrost rate threshold is 40%. When the modular frost rate is greater than or equal to the defrost rate threshold, it means that there are a large number of modules to be defrosted in the current heating unit. If the current heating unit continues to run, it will seriously affect the heating performance. The current heating unit needs to stop heating and switch to other air-cooled module units as heating unit units for heating. Therefore, the water availability status of the standby unit is obtained to determine whether the standby unit can be used to heat the terminal.

[0047] In one embodiment, after obtaining the statistical number of modules to be defrosted in the current heating unit, the method further includes:

[0048] When the statistical number is less than the number threshold, the module to be defrosted in the current heating unit is controlled to enter a preset defrost mode; or

[0049] When the modular frost rate corresponding to the statistical number is less than the defrost rate threshold, the module to be defrosted in the current heating unit is controlled to enter a preset defrost mode.

[0050] Specifically, when the statistical number is less than the number threshold or the modular frost rate is less than the defrost rate threshold, it means that the impact of the subsequent defrosting of the module to be defrosted in the current heating unit unit on the heating effect is small, then the module to be defrosted is controlled to stop heating and enter the preset defrost mode for defrosting. In this embodiment, the module to be defrosted is controlled to enter the natural defrost mode for natural defrosting, and the other air-cooled modules in the current heating unit unit that do not need defrosting maintain the heating mode.

[0051] In one embodiment, obtaining the water path availability status of the standby unit includes:

[0052] Obtaining the usage status of each air-cooling module in the standby unit and the usage status of the connecting device between the standby unit and the terminal coil;

[0053] When the use status of at least one air cooling module in the standby unit is normal and the use status of the connecting device between the standby unit and the terminal coil is normal, determining that the water channel availability status of the standby unit is available; or

[0054] When the usage status of all air cooling modules in the standby unit is abnormal, and / or the usage status of the communication device between the standby unit and the terminal coil is abnormal, the water channel availability status of the standby unit is determined to be unavailable.

[0055] Specifically, the water availability status of the standby unit is determined by the usage status of all air-cooling modules in the standby unit and the usage status of the connecting device between the standby unit and the terminal coil. The usage status of the air-cooling module is specifically normal or abnormal. When the usage status of the air-cooling module is normal, it indicates that the air-cooling module is available. When the usage status of the air-cooling module is abnormal, it indicates that the air-cooling module is unavailable. The connecting device between the standby unit and the terminal coil includes a corresponding water outlet valve and a hot water pump. The usage status of the connecting device is determined by the usage status of the water outlet valve and the usage status of the hot water pump. When the usage status of the water outlet valve and the usage status of the hot water pump are both normal, it indicates that the water outlet valve and the hot water pump are available, that is, the usage status of the connecting device is normal. When the usage status of the water outlet valve and / or the usage status of the hot water pump are abnormal, it indicates that the water outlet valve and / or the hot water pump are unavailable, that is, the usage status of the connecting device is abnormal.

[0056] When the usage status of at least one air-cooling module in the standby unit is normal, it indicates that the standby unit is available, and the usage status of the connecting device between the standby unit and the terminal coil is also normal, then the water path availability status of the standby unit is determined to be available, that is, the standby unit can provide heating to the terminal coil.

[0057] When the usage status of all air-cooling modules in the standby unit is abnormal, it means that the standby unit is unavailable and cannot provide heating, and / or the usage status of the connecting device between the standby unit and the terminal coil is abnormal, and the standby unit cannot successfully provide heating for the terminal coil. At this time, it is determined that the water path availability status of the standby unit is unavailable.

[0058] In one embodiment, when the water path of the standby unit is in the available state, opening the communicating water path between the standby unit and the terminal coil, and controlling the standby unit to enter the heating mode, includes:

[0059] When the water channel availability status of the plurality of standby unit units is available, obtaining the accumulated working time of each of the standby unit units;

[0060] The communicating water path between the standby unit with the shortest cumulative working time and the terminal coil is opened, and the standby unit with the shortest cumulative working time is controlled to enter the heating mode.

[0061] Specifically, when there are multiple available standby units, the cumulative operating hours of each standby unit are obtained, and the standby unit with the shortest cumulative operating hours is used as the final heating unit to be switched. The shortest cumulative operating hours means the unit has been activated the least number of times, and the standby unit with the least number of activations is preferentially used for heating, thereby balancing the activation frequencies of the various air-cooling module units and extending the overall service life of the air-cooling module unit system 110. Therefore, the water path connecting the standby unit with the shortest cumulative operating hours and the terminal coil is opened, and the standby unit with the shortest cumulative operating hours is controlled to enter the heating mode.

[0062] It is also possible to simultaneously enable multiple standby unit units for heating according to the heating instruction of the terminal coil. That is, when the heating instruction indicates that the heating capacity demand of the terminal coil is large, the connecting water paths between the corresponding number of standby unit units and the terminal coil are opened according to the heating capacity demand, and the corresponding number of standby unit units are controlled to enter the heating mode. The heating capacity demand is equal to the sum of the maximum heating capacity of the corresponding number of standby unit units, so as to determine the number of enabled standby unit units.

[0063] In one embodiment, the step of opening the communication water path between the standby unit and the terminal coil and controlling the standby unit to enter a heating mode includes:

[0064] Sequentially opening the first hot water pump and the first water outlet valve between the standby unit and the terminal coil;

[0065] After the first water outlet valve is opened, the air cooling module in the standby unit is controlled to enter the heating mode.

[0066] Specifically, when connecting the water path between the standby unit and the terminal coil, it is necessary to first start the first hot water pump between the standby unit and the terminal coil. After the first hot water pump is running, open the first water outlet valve between the standby unit and the terminal coil. After the first water outlet valve is in place, start the air cooling module in the standby unit for heating. If the air cooling module in the standby unit is started for heating first and then the first water outlet valve and the first hot water pump are opened, the heating capacity output by the air cooling module may accumulate at the first water outlet valve or the first water outlet pump waiting for the first water outlet valve or the first hot water pump to be opened, which may easily cause the heating capacity to be transferred back to the air cooling module and cause large heat loss. Therefore, controlling according to the sequence provided in this embodiment can ensure that the heating capacity output by the air cooling module in the standby unit can smoothly pass through the first water outlet valve and the first water outlet pump in sequence to reach the terminal coil, thereby reducing the heat loss during the transmission of the heating capacity.

[0067] In one embodiment, after the standby unit enters the heating mode, disconnecting the connecting water path between the current heating unit and the terminal coil, and controlling the current heating unit to enter the preset defrost mode, includes:

[0068] After the air cooling module in the standby unit enters the heating mode, controlling all air cooling modules in the current heating unit to stop running;

[0069] After all air-cooling modules in the current heating unit stop operating, the second water outlet valve and the second hot water pump between the current heating unit and the terminal coil are closed in sequence, wherein the second water outlet valve and the first water outlet valve are water outlet valves in different branches, and the second hot water pump and the first hot water pump are hot water pumps in different branches;

[0070] After the second hot water pump is turned off, the module to be defrosted in the current heating unit is controlled to operate according to a preset defrost mode.

[0071] Specifically, after determining that the air-cooling module in the standby unit has entered the heating mode, all air-cooling modules in the current heating unit are turned off, that is, all air-cooling modules in the current heating unit are stopped from running. At this time, all air-cooling modules in the current heating unit are turned off because there is a standby unit that can replace the current heating unit to provide heating for the terminal coil, avoiding the situation where all air-cooling modules in the current heating unit are turned off without activating the standby unit, thereby stopping the output of heating and affecting the heating of the terminal coil.

[0072] After shutting down all the air-cooling modules in the current heating unit, in order to prevent the subsequent defrosting of the module to be defrosted in the current heating unit from affecting the heating effect of the terminal coil, it is necessary to isolate the current heating unit to be defrosted from the terminal coil. Therefore, the second outlet valve between the current heating unit and the terminal coil is closed first, and the remaining heating output of the current heating unit is prohibited from being transferred to the terminal coil. After the second outlet valve is closed, the second hot water pump in the water path connecting the current heating unit and the terminal coil is turned off. After the second hot water pump is closed, it means that the connecting water path between the current heating unit and the terminal coil is completely disconnected. At this time, the module to be defrosted in the current heating unit can be controlled to enter the preset defrost mode for defrosting. In this embodiment, the module to be defrosted in the current heating unit is entered into the natural defrost mode for natural defrosting. Since the connecting water path between the current heating unit and the terminal coil has been disconnected, the defrost temperature of the module to be defrosted in the current heating unit will not affect the heating effect of the terminal coil.

[0073] In one embodiment, after obtaining the water path availability status of the standby unit, the method further includes:

[0074] When the water channel availability status of the standby unit is unavailable, the module that does not need to be defrosted in the current heating unit is controlled to continue to operate in the heating mode, and the module to be defrosted in the current heating unit is controlled to enter the preset defrost mode.

[0075] Specifically, when the water channel availability status of the standby unit is unavailable, the current heating unit unit cannot be switched, and the current heating unit unit can only be used to continue heating. However, in order to meet the defrosting needs of the module to be defrosted, the module to be defrosted in the current heating unit unit is turned off, and the air-cooling module that does not need defrosting in the current heating unit unit is controlled to continue to operate in the heating mode, and the module to be defrosted is controlled to enter the preset defrost mode for defrosting. Here, the module to be defrosted can be controlled to enter the natural defrost mode or the forced defrost mode. Specifically, it can be selected to operate in the natural defrost mode and the forced defrost mode according to the defrost instruction. The defrost instruction can be triggered by the user or pre-configured in the configuration file.

[0076] Since the water path between the standby unit and the terminal coil is unavailable, it is nothing more than at least one of the following: the standby unit is unavailable, the water outlet valve between the standby unit and the terminal coil is unavailable, and the hot water pump between the standby unit and the terminal coil is unavailable. Therefore, when the water path availability status of the standby unit is unavailable, an alarm prompt indicating that there is no available water path between the standby unit and the terminal coil will also be output. The alarm prompt is used to remind the user to repair the unavailable equipment in time to avoid the air-cooled module unit system 110 being unable to meet the heating demand of the terminal coil for a long time.

[0077] In a specific embodiment, referring to Figure 2 The current operation mode of the air-cooling module unit system 110 is the heating mode. When the current heating mode is running, the air-cooling module unit A1, the water outlet valve B1 are opened, and the hot water pump C1 is running, that is, the air-cooling module unit A1 is the current heating unit.

[0078] Reference Figure 2 and Figure 4 , the execution steps of the defrost control method are as follows:

[0079] Step 1: Monitor the frost status of the air-cooling modules in the running air-cooling module unit A1, count the number of modules to be defrosted to obtain a statistical number, calculate the modular frost rate a based on the statistical number, and then compare the modular frost rate with the defrost rate threshold b (default 40%);

[0080] Step 2: When the modular frost rate a is less than the defrost rate threshold b, the air-cooled module system 110 enters the natural defrost mode. A shutdown command is issued to the module to be defrosted in the air-cooled module unit A1, and the module to be defrosted is allowed to defrost naturally. Other air-cooled modules that do not need to be defrosted remain in the heating mode.

[0081] Step 3: When the modular frost rate a ≥ the defrost rate threshold b, the air-cooled module unit system 110 enters the unit defrost switching mode;

[0082] Step 4: Determine whether the water path where the air-cooling module unit A2 and the air-cooling module unit A3 are located is available, that is, obtain the water path availability status of the air-cooling module unit A2 and the air-cooling module unit A3;

[0083] Step 5: If the water path of air-cooling module unit A2 is available, that is, the water path availability status of air-cooling module unit A2 is available, start the first hot water pump C2. After the first hot water pump C2 is running, open the first water outlet valve B2. After the first water outlet valve B2 is fully opened, start the air-cooling module in air-cooling module unit A2. After the air-cooling module in air-cooling module unit A2 is running, a shutdown command is issued to all air-cooling modules in air-cooling module unit A1. After all air-cooling modules in air-cooling module unit A1 stop running, close the second water outlet valve B1. After the second water outlet valve B1 is fully closed, turn off the second hot water pump C1. At this time, the module to be defrosted in air-cooling module unit A1 is controlled to enter the natural defrost mode, and the air-cooling module in air-cooling module unit A2 performs heating.

[0084] Step 6: If the system has no water circuit available, that is, the water circuit availability status of the air-cooling module unit A2 and the air-cooling module unit A3 is unavailable, for example, the air-cooling modules in the air-cooling module unit A2 and the air-cooling module unit A3 are both faulty, and / or the outlet valves corresponding to the air-cooling module unit A2 and the air-cooling module unit A3 are both faulty, and / or the hot water pumps corresponding to the air-cooling module unit A2 and the air-cooling module unit A3 are both faulty, then the module to be defrosted in the air-cooling module unit A1 is controlled to operate in a forced defrosting mode, and the air-cooling modules that do not need to be defrosted maintain heating operation. At the same time, the air-cooling module unit system 110 issues an alarm prompt of "Please repair the system equipment", reminding the user to repair the unavailable equipment detected by the air-cooling module unit system 110, so as to avoid the air-cooling module unit system 110 being unable to meet the heating demand of the terminal coil for a long time.

[0085] Figure 3 and Figure 4 FIG. 1 is a flow chart of a defrost control method in one embodiment. It should be understood that although Figure 3 and Figure 4 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figure 3 and Figure 4 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0086] In one embodiment, Figure 5 As shown, a defrost control device 120 is provided, and the defrost control device 120 includes:

[0087] The first acquisition module 310 is used to obtain the statistical number of modules to be defrosted in the current heating unit;

[0088] The second acquisition module 320 is configured to acquire the water channel availability status of the standby unit when the statistical number satisfies the unit switching condition, wherein the number of modules to be defrosted in the standby unit is less than the statistical number;

[0089] The first control module 330 is configured to open the water path between the standby unit and the terminal coil when the water path of the standby unit is in the available state, and control the standby unit to enter the heating mode;

[0090] The second control module 340 is configured to disconnect the connecting water path between the current heating unit and the terminal coil after the standby unit enters the heating mode, and control the current heating unit to enter the preset defrost mode.

[0091] In one embodiment, the second acquisition module 320 is further configured to:

[0092] When the statistical quantity is greater than or equal to the quantity threshold, obtaining the water path availability status of the standby unit; or,

[0093] When the modular frost rate corresponding to the statistical quantity is greater than or equal to the defrost rate threshold, the water channel availability status of the standby unit is obtained.

[0094] In one embodiment, the first control module 330 is further configured to:

[0095] When the statistical number is less than the number threshold, the module to be defrosted in the current heating unit is controlled to enter a preset defrost mode; or

[0096] When the modular frost rate corresponding to the statistical number is less than the defrost rate threshold, the module to be defrosted in the current heating unit is controlled to enter a preset defrost mode.

[0097] In one embodiment, the second acquisition module 320 is further configured to:

[0098] Obtaining the usage status of each air-cooling module in the standby unit and the usage status of the connecting device between the standby unit and the terminal coil;

[0099] When the use status of at least one air cooling module in the standby unit is normal and the use status of the connecting device between the standby unit and the terminal coil is normal, determining that the water channel availability status of the standby unit is available; or

[0100] When the usage status of all air cooling modules in the standby unit is abnormal, and / or the usage status of the communication device between the standby unit and the terminal coil is abnormal, the water channel availability status of the standby unit is determined to be unavailable.

[0101] In one embodiment, the first control module 330 is further configured to:

[0102] When the water channel availability status of the plurality of standby unit units is available, obtaining the accumulated working time of each of the standby unit units;

[0103] The communicating water path between the standby unit with the shortest cumulative working time and the terminal coil is opened, and the standby unit with the shortest cumulative working time is controlled to enter the heating mode.

[0104] In one embodiment, the first control module 330 is further configured to:

[0105] Sequentially opening the first hot water pump and the first water outlet valve between the standby unit and the terminal coil;

[0106] After the first water outlet valve is opened, the air cooling module in the standby unit is controlled to enter the heating mode.

[0107] In one embodiment, the second control module 340 is further configured to:

[0108] After the air cooling module in the standby unit enters the heating mode, controlling all air cooling modules in the current heating unit to stop running;

[0109] After all air-cooling modules in the current heating unit stop operating, the second water outlet valve and the second hot water pump between the current heating unit and the terminal coil are closed in sequence, wherein the second water outlet valve and the first water outlet valve are water outlet valves in different branches, and the second hot water pump and the first hot water pump are hot water pumps in different branches;

[0110] After the second hot water pump is turned off, the module to be defrosted in the current heating unit is controlled to operate according to a preset defrost mode.

[0111] In one embodiment, the first control module 330 is further configured to:

[0112] When the water channel availability status of the standby unit is unavailable, the module that does not need to be defrosted in the current heating unit is controlled to continue to operate in the heating mode, and the module to be defrosted in the current heating unit is controlled to enter the preset defrost mode.

[0113] like Figure 6As shown, the embodiment of the present application provides a temperature control device, including a processor 711, a communication interface 712, a memory 713 and a communication bus 714, wherein the processor 711, the communication interface 712, and the memory 713 communicate with each other through the communication bus 714.

[0114] Memory 713, for storing computer programs;

[0115] In one embodiment of the present application, the processor 711 is configured to implement the defrost control method provided by any one of the aforementioned method embodiments when executing a program stored in the memory 713 .

[0116] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the temperature control device to which the solution of the present application is applied. The specific temperature control device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0117] In one embodiment, the defrost control system provided by the present application can be implemented in the form of a computer program. The computer program can be used in Figure 6 The temperature control device can store various program modules that make up the defrost control system, such as: Figure 5 The first acquisition module 310, the second acquisition module 320, the first control module 330 and the second control module 340 are shown. The computer program composed of various program modules enables the processor to execute the steps of the defrost control method of each embodiment of the present application described in this specification.

[0118] Figure 6 The temperature control device shown can be Figure 5 The first acquisition module 310 in the defrost control system shown is executed to obtain the statistical number of modules to be defrosted in the current heating unit. The temperature control device can obtain the water channel availability status of the standby unit through the second acquisition module 320 when the statistical number meets the unit switching condition, wherein the number of modules to be defrosted in the standby unit is less than the statistical number. The temperature control device can connect the connecting water channel between the standby unit and the terminal coil when the water channel availability status of the standby unit is available through the first control module 330, and control the standby unit to enter the heating mode. The temperature control device can disconnect the connecting water channel between the current heating unit and the terminal coil after the standby unit enters the heating mode through the second control module 340, and control the current heating unit to enter the preset defrost mode.

[0119] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the defrost control method provided in any of the aforementioned method embodiments are implemented.

[0120] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected to achieve the objectives of this embodiment based on actual needs.

[0121] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, or of course by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a temperature control device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiment.

[0122] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0123] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A defrost control method, characterized in that: The method comprises: Get the statistical number of modules to be defrosted in the current heating unit; When the statistical number meets the unit switching condition, obtaining the water channel availability status of the standby unit, wherein the number of modules to be defrosted in the standby unit is less than the statistical number; When the water path of the standby unit is in the available state, the communicating water path between the standby unit and the terminal coil is opened, and the standby unit is controlled to enter the heating mode; After the standby unit enters the heating mode, disconnecting the connecting water path between the current heating unit and the terminal coil, and controlling the current heating unit to enter the preset defrost mode; When the statistical quantity meets the unit switching condition, obtaining the water path availability status of the standby unit includes: When the statistical quantity is greater than or equal to the quantity threshold, obtaining the water path availability status of the standby unit; or, When the modular frost rate corresponding to the statistical quantity is greater than or equal to the defrost rate threshold, the water channel availability status of the standby unit is obtained.

2. The method according to claim 1, characterized in that After obtaining the statistical number of modules to be defrosted in the current heating unit, the method further includes: When the statistical number is less than the number threshold, the module to be defrosted in the current heating unit is controlled to enter a preset defrost mode; or When the modular frost rate corresponding to the statistical number is less than the defrost rate threshold, the module to be defrosted in the current heating unit is controlled to enter a preset defrost mode.

3. The method according to claim 1, characterized in that The obtaining of the water path availability status of the standby unit includes: Obtaining the usage status of each air-cooling module in the standby unit and the usage status of the connecting device between the standby unit and the terminal coil; When the use status of at least one air cooling module in the standby unit is normal and the use status of the connecting device between the standby unit and the terminal coil is normal, determining that the water channel availability status of the standby unit is available; or When the usage status of all air cooling modules in the standby unit is abnormal, and / or the usage status of the communication device between the standby unit and the terminal coil is abnormal, the water channel availability status of the standby unit is determined to be unavailable.

4. The method according to claim 1, wherein When the water path of the standby unit is in the available state, the communicating water path between the standby unit and the terminal coil is opened, and the standby unit is controlled to enter the heating mode, including: When the water channel availability status of the plurality of standby unit units is available, obtaining the accumulated working time of each of the standby unit units; The communicating water path between the standby unit with the shortest cumulative working time and the terminal coil is opened, and the standby unit with the shortest cumulative working time is controlled to enter the heating mode.

5. The method according to claim 1, characterized in that The step of opening the communication water path between the standby unit and the terminal coil and controlling the standby unit to enter a heating mode includes: Sequentially opening the first hot water pump and the first water outlet valve between the standby unit and the terminal coil; After the first water outlet valve is opened, the air cooling module in the standby unit is controlled to enter the heating mode.

6. The method according to claim 5, characterized in that After the standby unit enters the heating mode, disconnecting the connecting water path between the current heating unit and the terminal coil, and controlling the current heating unit to enter the preset defrost mode, including: After the air cooling module in the standby unit enters the heating mode, controlling all air cooling modules in the current heating unit to stop running; After all air-cooling modules in the current heating unit stop operating, the second water outlet valve and the second hot water pump between the current heating unit and the terminal coil are closed in sequence, wherein the second water outlet valve and the first water outlet valve are water outlet valves in different branches, and the second hot water pump and the first hot water pump are hot water pumps in different branches; After the second hot water pump is turned off, the module to be defrosted in the current heating unit is controlled to operate according to a preset defrost mode.

7. The method according to claim 1, characterized in that After obtaining the water path availability status of the standby unit, the method further includes: When the water channel availability status of the standby unit is unavailable, the module that does not need to be defrosted in the current heating unit is controlled to continue to operate in the heating mode, and the module to be defrosted in the current heating unit is controlled to enter the preset defrost mode.

8. A defrost control device, characterized in that: The defrost control device comprises: The first acquisition module is used to obtain the statistical number of modules to be defrosted in the current heating unit; a second obtaining module, configured to obtain the water channel availability status of the standby unit when the statistical number satisfies the unit switching condition, wherein the number of modules to be defrosted in the standby unit is less than the statistical number; a first control module, configured to, when the water path availability status of the standby unit is available, connect the communicating water path between the standby unit and the terminal coil, and control the standby unit to enter a heating mode; a second control module, configured to disconnect the connecting water path between the current heating unit and the terminal coil after the standby unit enters the heating mode, and control the current heating unit to enter the preset defrost mode; The second acquisition module is further configured to: When the statistical quantity is greater than or equal to the quantity threshold, obtaining the water path availability status of the standby unit; or, When the modular frost rate corresponding to the statistical quantity is greater than or equal to the defrost rate threshold, the water channel availability status of the standby unit is obtained.

9. A defrost control system, characterized in that: The defrost control system includes an air-cooling module unit system and a defrost control device as described in claim 8, the defrost control device is communicatively connected to the air-cooling module unit system, the air-cooling module unit system includes a plurality of air-cooling module unit units, the first end of each of the air-cooling module unit units is connected to the first end of the terminal coil through a water outlet valve, the second end of each of the air-cooling module unit units is connected to the second end of the terminal coil through a hot water pump parallel group, and the hot water pump parallel group includes a plurality of parallel hot water pumps.

10. A temperature control device, characterized in that: The temperature control device includes the defrost control system according to claim 9.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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